ToolFlock

Originality.ai

Originality.ai provides AI-writing detection and plagiarism checking with a Chrome extension and team accounts. It scores how likely a text is AI-generated and highlights the passages driving that score.

#28 in Writing & Translation ToolsAI DetectorsPlagiarism CheckersFree plan

Who it's for

Best for

  • Publishers and agencies screening freelance articles for AI text
  • Website owners checking many posts for AI and copied text

Not for

  • Writers who need proof their own work is human
  • Teams that need consistent detection scores over time

Pricing

Free plan$0
Pro$14.95/mo
Enterprise$179/mo

Features

  • AI checker

    Scores how likely a text was written by AI and colours the sentences that push the score up or down.

  • Plagiarism checker

    Compares the text with pages on the web and lists matching sources so copied passages can be found and fixed.

  • Chrome extension

    Checks text inside Google Docs and other pages from the browser, and can replay how a document was written.

  • Team accounts and history

    Lets agencies share credits across a team and keep a history of past scans for later review.

  • Fact and readability checks

    Adds checks for factual claims, grammar and readability alongside the AI and plagiarism scans.

What users say

Pros

  • Reported 79% detection accuracy, well above OpenAI's 26% text classifier.
  • Catches AI-generated text that weaker detection tools miss.
  • Marks which parts of a text look machine-written instead of giving only one score.

Cons

  • Flags original, non-AI writing as almost certainly AI-generated.
  • Model updates changed scores on previously scanned texts and removed earlier model versions.

A selection of the review sources we used:

Summarized from public user reviews and community discussions. View details

Global Traffic Rank

Top 100k

Alternatives

Originality.aiGPTZeroPlagiarismCheck.orgScribbr
Rank#28 in category#12 in category#17 in category#18 in category
Free planYesYesYesYes
ProCatches AI text and shows which parts look generatedCatches edited AI text and shows a human, mixed, AI splitEarly red flags, clear reports, per-article checks, AI detectionHandy citation tool, explained proofreading, solid checks
Better forChecking classroom assignments inside Canvas or Google Classroom and spotting invented citations.
Weaker atScreening freelance web articles in bulk with shared agency credits and full-site scans.